5,11-dihydrodibenzoxa (or thia) zepine derivatives

ABSTRACT

5,11-DIHYDRODIBENZOXA (OR THIA) ZEPINE DERIVATIVES ARE PROVIDED HAVING THE STRUCTURE   A&lt;(-((R)N-1,2-PHENYLENE)-N(-X-CO-N(-R2)-R3)-((R1)N1-1,2-   PHENYLENE)-CH2-)   WHEREIN A IS O, S, SO, OR SO2; R AND R1 ARE THE SAME OR DIFFERENT AND CAN BE HALOGEN, TRIFLUOROMETHYL, LOWER ALKYL, CYCLOALKYL, LOWER ALKYLMERCAPTO, LOWER ALKYLOXY, CYANO OR DI-LOWER ALKYLSULFAMOYL; X IS AN ALKYLENE RADICAL; R2 AND R3 MAY BE THE SAME OR DIFFERENT AND ARE HYDROGEN, LOWER ALKYL, SUBSTITUTED OR UNSUBSTITUTED AMINOALKYLENE OF THE FORMULA   R&#39;&#39;2-N(-R&#39;&#39;3)-X&#39;&#39;-   WHEREIN R&#39;&#39;2 AND R&#39;&#39;3 CAN INCLUDE ANY OF THE R2 AND R3 RADICALS AND X&#39;&#39; CAN INCLUDE ANY OF THE X GROUPS, MONOCYCLIC CYCLOALKYL, MONOCYCLIC CYCLOALKYL-LOWER ALKYL, HYDROXY-LOWER ALKYL, MONOCYCLIC ARYL, MONOCYCLIC ARYLLOWER ALKYL, OR MONOCYCLIC HETEROCYCLIC ALKYL, OR R2 AND R3 MAY FORM A HETEROCYCLIC RADICAL ALOANG WITH THE NITROGEN TO WHICH THEY ARE ATTACHED; N IS O, 1 OR 2; AND N&#39;&#39; IS 0, 1, OR 2. THESE COMPOUNDS ARE USEFUL IN LOWERING BLOOD PRESSURE AND AS ANTI-INFLAMMATORY AGENTS.

United States Patent Ofice 3,766,210 Patented Oct. 16, 1973 3,766,210 5,11-DIHYDRODIBENZOXA (R THIA) ZEPINE DERIVATIVES Harry Louis Yale and Ramesh B. Petigara, New Brunswick, N.J., assignors to E. R. Squibb & Sons, Inc.,

New York, N.Y. N0 Drawing. Filed Nov. 24, 1970, Ser. No. 92,329 Int. Cl. C07d 51/70 US. Cl. 260-333 R Claims ABSTRACT OF THE DISCLOSURE 5,11-dihydrodibenzoxa (or thia) zepine derivatives are provided having the structure A-CH wherein A is O, S, S0, or S0 R and R are the same or different and can be halogen, trifiuoromethyl, lower alkyl, cycloalkyl, lower alkylmercapto, lower alkyloxy, cyano or di-lower alkylsulfamoyl; X is an alkylene radi-' cal; R and R may be the same or different and are hydrogen, lower alkyl, substituted or unsubstituted aminoalkylene of the formula \NX R4 wherein R' and R' can include any of the R and R radicals and X can include any of the X groups, monocyclic cycloalkyl, monocyclic cycloalkyl-lower alkyl, hydroxy-lower alkyl, monocyclic aryl, monocyclic aryllower alkyl, or monocyclic heterocyclic alkyl, or R and R may form a heterocyclic radical along with the nitrogen to which they are attached; n is 0, 1 or 2; and n' is 0, 1, or 2. These compounds are useful in lowering blood pressure and as anti-inflammatory agents.

The present invention relates to 5,11-dihydrodibenzoxa- (or thia)zepine derivatives of the structure wherein R and R' can include any of the R and R radicals and X can include any of the X groups, monocyclic cycloalkyl, monocyclic cycloalkyl-lower alkyl,

hydroxy-lower alkyl, monocyclic aryl, monocyclic aryllower alkyl, or monocyclic heterocyclic alkyl.

The

N. Rf

group may also form a heterocyclic radical.

X represents straight or branched chain bivalent aliphatic hydrocarbon groups having from one to about six carbon atoms in the linking chain, such as methylene, ethylene, propylene, butylene, dimethylethylene, l-propylbutylene, 1,2-diisopropyl pentylene, l-ethyl-Z-butylhexylene and the like. Furthermore, X as a bivalent group can correspond to any of the lower alkyl groups exemplified hereinafter with the carbon limitations noted above.

The term lower alkyl as employed herein includes both straight and branched chain radicals of up to eight carbon atoms, for instance, methyl, ethyl, propyl, isopropyl, butyl, t-butyl, isobutyl, pentyl, hexyl, isohexyl, heptyl, 4,4-dimethylpentyl, octyl, 2,2,4-trimethylpentyl, and the like.

The term halogen includes F, Br, C1 or I.

The term lower alkoxy includes straight and branched chain radicals which correspond to the above lower alkyl groups attached to an oxygen atom.

The lower alkylmercapto groups contain up to eight carbon atoms and include methylmercapto, ethylmercapto, propylrnercapto and mercapto radicals containing any of the lower alkyl groups mentioned hereinbefore.

The term monocyclic aryl as employed herein contemplates monocyclic carbocyclic aryl radicals, for instance, phenyl and substituted phenyl radicals, such as lower alkyl phenyl (e.g., 0-, mor p-tolyl, ethylphenyl, butylphenyl, and the like), di(lower alkyl)phenyl (e.g., 2,4-dimethylphenyl, 3,5-diethylphenyl, and the like), halophenyl (e.g., chlorophenyl, bromophenyl, iodophenyl, fluorophenyl), o-, mor p-nitrophenyl, dinitrophenyl (e.g., 3,5-dinitrophenyl, 2,6-dinitrophenyl, and the like), trinitrophenyl (e.g., picryl).

The term monocyclic cycloalky includes cyclic radicals containing from 3 to 6 ring members (e.g., cyclopropyl, cyclobutyl, cyclopentyl, and cyclohexyl).

The aminoalkylene group includes primary, secondary or tertiary aminoalkylene groups wherein R' and R' and X' can include any of the R R and X groups mentioned herein.

As indicated hereinbef'ore,

may form a heterocyclic radical. The symbols R and R may together represent the carbon (and hydrogen) and the oxygen, sulfur or nitrogen atoms which, with the nitrogen atoms in the above group form a 5-, 6- or 7-membered nitrogen heterocyclic containing not more than one hetero atom in addition to the nitrogen already shown in the group and less than 21 atoms in the radical (excluding hydrogen). The heterocyclic radicals may include one to three substituents including lower alkoxy, lower alkyl or aryl as defined hereinbefore; trihalornethoxy, such as trifluoromethoxy; trihalomethylmercapto, such as trifluoromethylmercapto; N,N-dialkylsulfamoyl groups, such as N,N-dimethylsulfamoyl; lower alkanoyl groups as defined hereinafter such as acetyl, propionyl, and the like; hydroxy; hydroxy-lower alkyl, such as hydroxymethyl, 2- hydroxyethyl, or the like; hydroxy-lower alkoxy-lower alkyl, such as 2-(2-hydroxyethoxy)ethyl, or the like; alkanoyloxy containing an alkanoyl as defined herein; alkanoyloxy-lower alkyl (up to about 14 carbons in the alkanoyl group), such as Z-heptanoyloxyethyl; carbolower alkoxy, such as carbomethoxy, carboethoxy, carbopropoxy, or the like; or Z-(alkanoyloxy-lower alkoxy)- lower alkyl (with up to about 14 carbons in the alkanoyl group), such as 2-(decanoyloxyethoxy)-ethyl, heterocyclic radicals such as defined herein as well as pyridyl and benzimidazolyl, or the like.

Illustrative of the heterocyclic radicals represented by are the following: piperidino; (lower alkyl)piperidino [e.g., 2-, 3- or 4(lower alkyl)piperidino such as 2-(ethyl) piperidino, or 4-(isopropyl)piperidino]; di(lower alkyl) piperidino [e.g., 2,4-, 2,5- or 3,5-di(lower alkyl)piperidino such as 2,4-di(methyl)piperidino or 2,5-di(t-butyl)piperidino]; (lower alkoxy)piperidino ['e.g., Z-methoxypiperidino or 3-methoxypiperidino]; hydroxypiperidino [e.g., 3-hydroxyor 4-hydroxypiperidino]; aminomethylpiperidino [e.g., 4-aminomethylpiperidino]; 4-[1-(2-oxobenzimidazolyl]piperidino; 4,4 disubstituted piperidino like 4 hydroxy 4 phenylpiperidino or 4-hydroxy-4-pchloro or p-rnethyl or m-(trifiuoromethyl)phenylpiperidino, 4 carbamoyl 4 [piperidino]piperidino; pyrrolidino; (lower alkyl)pyrrolidino [e.g., 3-(methyl)pyrrolidino]; di(lower alkyl)pyrrolidino [e.g., 3,4-(dimethyl) pyrrolidino]; (lower alkoxy)pyrrolidino [e.g., 2-methoxypyrrolidino]; morpholino; (lower alkyl)morpholino [e.g., 3-methylrnorpholino]; di(lower alkyl)morpholino [e.g., 3,5 dimethylmorpholino]; (lower alkoxy)morpholino [e.g., 2 methoxymorpholino]; thiamorpholino; (lower alkyl)thiamorpholino [e.g., 3-methylthiamorpholino]; di- (lower alkyl)thiamorpholino [e.g., 3,5 dimethylthiamorpholino]; (lower alkoxy)thiamorpholino [e.g., 3-methoxythiamorpholino]; piperazino; N -aryl piperazino, [e.g., oanisyl, p-chlorophenyl or m-tolyl piperazino]; (lower alkyl)piperazino [e.g., N-methylpiperazino]; di(lower alkyl)piperazino [e.g., 2,5-dimethylpiperazino or 2,6-dimethylpiperazino]; (lower alkoxy)piperazino [e.g., 2- methoxypiperazino]; (hydroxy-lower alkyl)piperazino [e.g., N -(2 hydroxyethyl)piperazino]; (alkanoyloxylower alkyl)piperazino wherein the alkanoyloxy group has up to 14 carbons [e.g., N (2-heptan0yloxyethyl) piperazino or N -(2 dodecanoyloxyethyl)piperazino]; (hydroxy-lower alkoxy-lower alkyl)piperazino [e.g., (hydroxy-methoxy-methyl)piperazino]; (carbo-lower alkoxy) piperazino [e.g., N -(carbomethoxy-, carboethoxy-, or carbopropoxy)piperazino]; N heterocyclic-piperazino [e.g., N (pyridyl)piperazino]; homopiperazino; or N (hydroxy-lower alkyl)homopiperazino [e.g., N -(2-hydroxyethyl homopiperazino] The N-oxides of the compounds of Formula I where Y represents a nitrogen containing heterocyclic radical can be formed by reacting such Formula I compounds with a peracid such as m-chloroperbenzoic acid, perbenzoic acid or monoperphthalic acid in a suitable solvent such as chloroform.

The compounds of Formula I form acid addition salts by reaction with various inorganic and organic acids. These salts frequently provide convenient means for separating the product from the reaction mixture in which it is produced or from the solvent in which it is extracted in view of their insolubility in various media. Thus the product may be precipitated in the form of an insoluble salt and converted, by conventional techniques, to the free base or to another soluble or insoluble salt as desired.

Illustrative salts include the hydrohalides, such as hydrochloride, hydrobromide and hydroiodide, especially the first two, other mineral acid salts such as phosphate, sulfate, nitrate, etc., organic acid salts such as oxalate, tartrate, malate, maleate, citrate, pamoate, fumarate, camphorsulfonate, methanesulfonate, benzenesulfonate, toluenesulfonate, salicylate, benzoate, ascorbate, mandelate, or the like.

The compounds of Formula I also form quaternary ammonium salts with lower alkyl halides, for example, methyl bromide, ethyl bromide and propyl iodide; benzyl halides, such as benzyl chloride; and dilower alkyl sulfates, such as dimethyl sulfate. To form the quaternary ammonium salts, the free base initially formed is interacted with at least one equivalent of the desired alkylating agent in a suitable solvent, e.g., acetone, benzyl alcohol, dioxane or cyclohexanone.

Examples of compounds falling within the present invention include, but are not limited to, the following wherein the symbol A represents O, S-, -SO and --SO each formula therefore, in essence, representing four species.

1 A-on,

2 A-crn FaC (ilHzCHg CN CH1 CHzN(CzHs)I (3) A-CH,

r (CH2)3C N( CH; OHZN (0113):);

4 x-cn.

I 0 Fa N can I A-CH:

N CH;

on; cm

( A-cm 02mg 0,115 N/ 011-1,

l (cum-0N ti 0110mm /ACH,

( 5) ACI{ F: C O

OCH; amok N (26) /ACH2 The compounds of Formula I can be prepared by reacting a compound of the structure (II) A-CH: (R)::@ @011) Ji-COOH wherein R, R X, n, 11 and A are as defined hereinbefore, with a phosphorus pentahalide, such as phosphorus pentachloride in a molar ratio of II:pentahalide of within the range of from about 0.9:1 to about 1:1, in the absence of oxygen, and in the presence of an inert solvent, such as benzene, toluene, xylene, pentane, hexane, etc., at a temperature within the range of from about 0 to about C., to form an acyl halide of the structure (III) A--CH1 X( JHal The acyl halide III can then be reacted with a compound of the structure in a molar ratio of acyl halide IIIzcompound IV of within the range of from about 1:1 to about 2:1, using a solvent such as chloroform, benzene, toluene or xylene, at a temperature within the range of from about to about 130 C., to form the Formula I compounds.

Furthermore, compound IV can be reacted with an ester of the structure (IVa) A-CH:

(ma (Ron,

X-COOR' wherein R is lower alkyl preferably methyl, with a compound of the structure IV in a molar ratio of =IVa:IV of from about 1:1 to 1:5, with or without a solvent to form compounds of Formula I; when a solvent is employed, it can be represented by benzene, toluene, xylene or the like.

In addition, compounds of the invention can be prepared by reacting the acid (II) A-CIQ with a compound of the structure (V) s O-CH1 (R). (nor,

X-COOH Compound V or an ester thereof such as compounds IVa or IX defined hereinafter can then be reacted with an amino alkylene amine as described hereinbefore to form the compounds of Formula I.

Compounds of Formula I wherein A is $0 can be formed by treating compound II or sulfoxide V with an oxidizing agent like H 0 in formic or acetic acid to give sulfones of the structure VI.

(VI) S 03-CH1 X-COOH The starting materials of Formula II are prepared by several methods. One method comprises reacting compounds having the Formula VII:

( A-CH,

(run (Run,

with a nitrile of Formula VIIa (e.g., acrylonitrile, 2-

methylacrylonitrile, 2 isopropylacrylonitrile, 2 pentylacrylonitrile, and so forth):

(VIIa) CHME-CN (VIII) wherin n, 11 R, R A and R are as defined herein.

This reaction is carried out by employing an excess of the nitrile CH :CR CN as the solvent. The temperature utilized in the reaction can be varied from about 0 to about 100 C. with the preferred range being between about 0 and about 55 C. This reaction proceeds expeditiously when a small amount (up to about 1%) of a strong base like sodium hydroxide, sodium methoxide, potassium t-butoxide, or benzyl trimethylammonium hydroxide (Triton B) is used as the catalyst.

Compounds with the nitrile structure VIII are converted to carboxylic acid of Formua II by heating at reflux temperatures with suflicient aqueous or alcoholic alkali metal hydroxide, e.g., sodium hydroxide or potassium hydroxide in methanol or ethanol.

Another procedure for preparing compounds of Formula I is to treat the compounds of structure VIII with alcoholic hydrogen halide, such as hydrogen chloride in methanol, ethanol, and so forth, at room temperature whereby esters of the structure IX are formed,

wherein R is lower alkyl.

By saponifying compound IX with an equivalent of alkali metal hydroxide, e.g., sodium hydroxide lithium hydroxide, and so forth, the desired carboxylic acids of structure II can be recovered.

Alternatively, a general procedure for preparing the compounds of structure II which may be utilized is to react the compounds having Formula VII with haloalkylenecyanide of the general structure IXa wherein Z is halogen e.g., chloro, iodo or bromo; and X is as defined herein. This yields a nitrile of Formula VIII. Examples of haloalkylenecyanide reagents that may be utilized are 3-chloropropionitrile, 3-bromobutyronitrile, and so forth. The reaction may be carried out in an alcohol, such as ethanol, propanol, and so forth, as the solvent, in the presence of at least one molar equivalent of anhydrous potassium carbonate, or in an aromatic solvent like benzene, toluene, or xylene, using at least one molar equivalent of alkali metal hydride, e.g., sodium hydride, lithium hydride, and so forth, or alkali metal amide, e.g., sodium amide or in an aliphatic ketone like acetone or ethyl methyl ketone using at least one molar equivalent of powdered alkali metal hydroxide, e.g., sodium hydroxide or lithium hydroxide. The desired temperature in these reactions is between 60 and 150 C. The compounds of Formula VI'II prepared by these reactions may be thereafter treated as indicated above to yield compounds of Formula I.

Examples of compounds of Formula VII where A is S are set out in US. P-ats. Nos. 3,188,321 and 3,188,322.

Examples of compounds of Formula II where A is O or S can be found in US. Pats. Nos. 3,069,432, and 3,453,046 and in a paper entitled Novel Polycyclic Heterocycles, by Yale et al., J. Med. Chem. 13, 713 (1970).

Examples of compounds of Formula VII wherein A is S0 or S0 can be found in the above mentioned paper by Yale et al.

Furthermore, compounds of Formula VII wherein A is SO can be formed by heating a compound of the structure in the presence of potassium carbonate, Cu bronze, and a suitable solvent to form compounds of the structure and treating compound XI with m-chloroperbenzoic acid in the presence of chloroform and then treating with ether to form a compound of the structure XII (XII) S O-CH;

Jmo

Wh ch can be treated with alcohol such as ethanol and base such as aqueous sodium hydroxide to form a compound of the structure (XIII) S O-CH;

Compounds of Formula VII wherein A is S0 can be formed by treating compounds of the structure XI with an oxidizing agent such as hydrogen peroxide in the presence of formic acid to form a compound of the structure (Rn (R1)...

AIHO

1 1 1 2 and treating XIV with alcohol such as ethanol and base (7) such as aqueous sodium hydroxide to form a compound of the structure NC 0,115 N dnmcoon \N/ w Acu,

NC 0 scH, Examples of starting materials which can be employed N in preparing the compounds of the invention include, but 15 AHZCHZCOOH are not limited to, the following wherein A can be 0, S, S0 or S0 (9) /A-cn, CF A-CH, I- a \N/ I N 01110 0 011 l CHzCHzCOOH (IN 2 A-CI{ A CH' U mca N I dmcmcoon z H (a A-CH1 40 (11) 5:

/ om- CH;

N E o'momooon 12 C 11 (4) A-CH, A-cm 1 g E sOzN CaHy NC F C N \N (dnmooou dmcmooon (5) /A-CH1 (13) A-CHQ org CH;

Nogs -F -s0,N 014; N N CH;

((EHZMCOOH (LHJCHICOOH (a) A-CH; (14) A-CH:

(Cl [iom m FzC- CH3 C F: N/ \N A-CH: 01mg Ewen, N

A-CHl A-CH; N C

C2115 O C F 1 HaCHaCOOH A-CHz @131 \@:CN C1 CzHa CH CH3 A-CH;

I I on, on.

( JHQCHaC O OH (22) A-CH:

C1 l CH CI'IZG O OH (23) ACH5 Cl \III CH: O 0 O H The compounds of the invention produce gradual hypotension beginning a few minutes after dosing and yielding a moderate hypotension, i.e., a fall in blood pressure of about 20% or greater lasting about five hours after dosing.

The hypotensive agents of the invention or a physiologically acceptable salt thereof may be compounded according to accepted pharmaceutical practice in oral dosage forms such as tablets, capsules, elixirs or powders or parenterally in an injectable form in a sterile vehicle prepared according to conventional pharmaceutical practice. The dosage level may vary from about 1 mg./kg. to about 50 mg./kg.

Liquid oral dosage forms may be prepared by dissolving the hypotensive agent in a suitable solvent, e.g., propylene glycol. Oral tablets may be prepared by incorporating the hypotensive agent into suitable pharmaceutical carriers. Injectable forms may be prepared by incorporating the hypotensive agent in a sterile vehicle, e.g., propylene glycol, according to conventional practice.

In addition, the new compounds of this invention have anti-inflammatory properties and are useful as anti-inflammatory agents, for example, to reduce local infiammatory conditions such as those of an edematous nature or resulting from proliferation of connective tissue in various mammalian species such as rats, dogs and the like when given orally in dosages of about 5 to 50 mg./kg./day, preferably 5 to 25 mg./kg./day, in single or 2 to 4 divided doses, as indicated by the carrageen edema assay in rats. The active substance may be utilized in compositions such as tablets, capsules, solutions or suspensions containing up to about 300 mg. per unit of dosage of a compound or mixture of compounds of Formula I or physiologically acceptable acid addition salt thereof. They may be compounded in conventional manner with a physiologically acceptable vehicle or carrier, excipient, binder, preservative, stabilizer, flavor, etc. as called for by accepted pharmaceutical practice. Topical preparations containing about 0.01 to 3 percent by weight of active substance in a lotion, salve or cream may also be used.

The compounds of the invention may also be used as surface disinfectants. About 0.01 to 1 percent by weight of any of these substances may be dispersed on an inert solid or in a liquid such as water and applied as a dust or spray. They may be incorporated also, for example, in a soap or other cleaning agent, e.g., a solid or liquid detergent, detergent composition, for example, in general cleaning, in cleaning dairy barns or equipment or cleaning food handling or processing equipment.

Furthermore, the compounds of the invention may be used as water-softeners and corrosion inhibitors.

The following examples are illustrative of the invention and constitute preferred embodiments. Other members of the class are produced by utilizing the appror priately substituted starting material.

1 5 EXAMPLE 1 N-[Z-(diethylamino)ethyl]-'5,1 l-dihydro-7-(trifluoromethyl) dibenz[b,e][1,4]oxazepine-S-propionamide oxalate (I) 5,11-dihydro-7-(trifluoromethyl)dibenz[b,e] [1,4] oxazepine-S-propionic acid (a) 5,1l-dihydro-7-(trifluoromethyl)dibenz[b.e.] [1,4] oxazepine-5-propionitrile.-To 50.0 g. of 5,1l-dihydro-7- (trifluoromethyl)dibenz[b,e,] [1,4]oxazepine in 60 ml. of

16 and to this 0.5 g. of potassium hydroxide dissolved in 25 ml. of water is added. The mixture is refluxed for taken up in 250 ml. of water and this solution is acidified with 2% aqueous HCl to give 5,11-dihydro7-(trifluoromethyl)dibenz[b,e,][1,4]oxazepine 5 propionic acid, M.P. about 107109. (II) N-[2-(diethylamino)ethy1]5,l1 dihydro 7 (trifluoromethyl)dibenz[b,e] [1,4]oxazepine 5 propionamide oxalate distilled acrylonitrile is added, in 5 minutes, 0.80 ml. of 10 To 1 f 5 11-dih d 7-(t ifl th ndib Triton B. Subsequently, the mixture is heated for one [b,e][1,4]oxazepine 5 propionic acid i 120 1, f hour under reflux and the product isolated by extraction anhydrous benzene at 5 is added dropwise 83 of i benzene to give yf y phosphorus pentachloride in 50 ml. of benzene. The reaci fidE P -P p about tion mixture is stirred for 1 hour at 30, 5.0 g. sodium 161-163". v 15 hydrosulfite added, and the whole filtered. The filtrate is y 9' -Q Y fiw] concentrated in vacuo, the residue is dissolved in 200 ml. oxazepme-S-propiomc a methyl r- ,11-d1hy r of refluxing petroleum ether, treated with Darco, and fil- 7 (trifluoromethyl)d1benz[b,e] [1,4]oxazepine-5-pr0p10- tered. This on cooling at 10 gives 10.3 g. (93%) of white flitlile, g-, is dissolved in 240 m1. of dry dioxane crystalline acid chloride, M.P. 76-77". This is dissolved and to this 140 ml. of methanolic hydrogen chlo- 20 in ml. of chloroform and the solution added dropride is added. The solution is stirred for 36 hours, 6 ml. wise to 4.64 g. of 2-(diethylamino)ethy1amine and 6.0, g. of H 0 is added, stirred 0.5 hour, and then concentrated of triethylamine in 50 ml. of chloroform. The reacting in vacuo to ml. The solid is filtered, and the filtrate mixture is heated under reflux for 7 hours, cooled, washed, is concentrated to dryness in vacuo. The residual liquid dried, and concentrated in vacuo to give the base. This is is taken up in 200 ml. of diethyl ether, treated with Darco 25 dissolved in 15 ml. of 2-propanol'and the solution treated and Hyflo, the diethyl ether solution is concentrated and with 3.0 g. of oxalic acid in 20 ml. of 2-propanol. This on the residue distilled in vacuo to give 5,1l-dihydro-7-(tricooling gives 10.1 g. of white crystalline product, M.P. fluoromethyl)dibenz[b,e,][1,4]oxazepine 5 propionic -182 (dec.).

d, h l .tfiztzwfiiast mm) 30 2 (c) 5,11-dihydro-7-(trifiuoromethyl)dibenz[b,e][1,4]- Employing the procedure of Example 1 including the oxazepine-S-propionic acid-5,11 dihydro-7- (trifiuorophosphorus pentachloride, but substituting the remaining methyl)dibenz[b,e,] [1,4]oxazepine 5 propionic acid, starting materials shown in columns 1 and 2 of Table I methyl ester, 3.15 g., is dissolved in 315 ml. of methanol below, the product shown in column 3 is obtained.

TABLE I Column 1 Column 2 Column 3 A-CIQ /R, A-CH,

HN (R0111 R ong @(Rfin I N N ('JH) COOH Ii/ EM-0Q N Ex. No. R n R; m A m R n R; m m Bs 2 H 0 3-01 1 0 2 (1H, As in Column 1 As in Column 2.

1 3-01 1 B 1 HN[CH(OH|)2]: As in Co1umn1 Do.

0 F 1 3 As in Column 1 Do.

5..-;..... 7-01; 1 H 0 0 2 HN/ \NCHl As in Columnl Do.

6...'.":."..' (MIN 1 3-CH5O 1 O 3 HzNCH:CH2N(C2H6)a AS111 Columnl D0.

7..'..-..... 7-SOzN-(CH3): 1 2-01 1 S 4 02H: As in Column 1 Do.

8..:::. 7-01 1 3-01 1 O 2 HN/ \N F As in Column 1 Do.

9 H 0 2-Cl, 3-Br 2 0 3 Aslu Column 1 Do.

'17 EXAMPLE 8 4- 3, 5,11 dihydro 7-(trifiuoromethyhdibenz[b,e[1,4] oxazepin-5-yl1propionyl1-1-piperazineethanol maleate A solution of 6.64 g. of 5,11-dihydro 7 (trifiuoro- 18 EXAMPLE 16 5,1 l-dihydro-l 1-(trifluoromethy1)-5- 3-morpholino-3- oxopropyl] -dibenz[b,e] 1,4]oxazepine A blended mixture of 7.0 g. of 5,11-dihydro-11-(triligi gs ggi gg? gg i f g ii i fluoromethyl)dibenz[b,e][1,4]oxazepine-S-propional acid p Xamp e an o methyl ester, and 2.0 g. of morpholine is heated at 70 azlneeth?nol m Q of Xylene .refluxed for for 1 hour, at 100 another hour and then at 125 for 2 hours Wlth azeotroplc removal of 9 usmg Dimn'stark hours. Next the reaction mixture is dissolved in 300 ml. 13 f gl i gg if a acuo 10 of ether, washed, dried, and the solvent distilled out; the

e resl ue 1s 1 mate. W1 0 i t i exam residue is heated in vacuo at The resultant semisolid .decanted and P t semlsohd mammal 1S dlssolved material is triturated with 30 ml. of cold hexane when f igf g g i ig g s ig ifi g i gg it solidifies to give 5.6 g. of yellowish White compound. standing gives 7.3 g. of white solid, which is recrystallized Z 5 gg ifgg z g z f gg g Z 52353 933 from ml. of refluxing 2-propanol to give 6.2 g. of the 15 M P 1010 g maleate, as a white crystalline solid, M.P. about 158- a out (dec.).

EXAMPLES 9 To 15 EXAMPLES 17 TO 23 Employing the procedure of Example 8, but substitut- 20 p y g the proc of EXamPIC 16, but Substituting the starting materials shown in columns 1 and 2 of ing the starting materials shown in columns 1 and 2 of Table II, the product shown in column 3 is obtained. Table III, the product shown in column 3 is obtained.

TABLE II Column 1 Column 2 Column 3 A-CH; HN/R: A-Cl o i l)nl o It, H,).,,-000H H) Jlfi Ra Ex. No. A R n R1 m n: A R 71 R 11 m R;

2 A i 0 1 1 A 1 0 1 2 9 0 6 04H; 1 2,3 di 0H; 2 HNwHmN/ /N cm s n oumn s n o umn 1O S 7-S02N'(CH|): 1 S-CgHl 1 3 Asln Columnl Do.

S HN CH2-N 11- 0 8-CH|O 1 roams-0F. 2 2 Asin Columnl D0. HN OH:-

12 s 9-ON 1 z-oms 1 a om As in Columnl Do.- EIN l 111:

- 1 13 o H o 2,3-d1c1 2 5 GHCHOH As in Column D0 14..- 0 7-OF; 1 343B: 1 3 OCH: Asin Column1 Do.

HN/ N O 15--- s 'I-CFs 1 3-01 1 2 TABLE III Column 1 Column 2 Column 3 A-CHa R1 A-CH: HN (R). on, (R1).

n i oH, ..,-o-on' cH,)..,o

R: EX.N0. A R n R1 11 m R A R 71 R1 711 n: R R1 O 7-CF 1 H 1 CH As in Column 1 As in Column 2. 17 a l HN/ 18 S fi-CN 1 3-I 1 2 C211; HN (CH2)2N(CH1)2 AsinColumnl Do.

19 0 B-CHzO 1 H 0 3 C111 CaHr Asln Columnl Do.

20 S 7,8-dl-Cl 2 3-CF 1 4 C H As in Columnl Do.

' HN monolon 21 0 7-CF; 1 3-03; 1 C 11 Asln Columnl Do.

HN N 0 N 22 8 7-131' 1 3-01 1 6 00H Cl Asin Column 1 Do.

HN N 0 6-CF 1 2-Br 1 3 CH AsinColumnl Do. 23 HN(om-N EXAMPLE 24 ml. of 2% aqueous sodium hydroxide solution. The ex- 4 [2-[7-chloro-5,1l-dihydrodibenz[b,e][1,4]thiazepin-5- yl]acetyl]a-methyl 1 piperazineethanol, oxide, maleate To a suspension of 36.2 g. of 7-chl0ro-5,1l-dihydrodibenz[b,e][1,4]thiazepine, 250 ml. of ethyl methyl ketone, 0.5 g. of copper-bronze, and 16.0 g. of powdered sodium hydroxide is added dropwise in 0.5 hour 15.1 g. of chloroacetonitrile. The mixture is stirred and refluxed for 10 hours, cooled, and filtered. The filtrate is concentrated in vacuo to remove all volatile material, the residue is crystallized from hexane to give 24.2 g. of 7-chloro-5, 11 dihydrodibenz[b,e] [1,4]thiazepine 5 acetonitrile, M.P. about 117-120".

The 7 chloro-5,11-dihydrodibenz[b,e] [l,4]thiazepine- S-acetonitrile, 24.2 g., is dissolved in 1200 ml. of dry dioxane and to this 800 ml. of methanolic hydrogen chloride is added. The solution is stirred for 72 hours; ml. of H 0 is added; the mixture is stirred for 0.5 hour, concentrated in vacuo to 400 ml., filtered, and the filtrate concentrated to dryness in vacuo. The residue solidifies on keeping which is then crystallized from 300 ml. of hexane to yield 20.5 g. 7-chloro-5,11-dihydrodibenz[b,e] [1,4]thiazepine-5-acetic acid, methyl ester, M.P. 68-70", which is dissolved in 2200 ml. of methanol and to this 5.6 g. of potassium hydroxide dissolved in 300 ml. of H 0 is added. The solution is refluxed for 4 hours, and then is concentrated in vacuo. The residue is taken up in 600 ml. of H 0; the solution is cooled, and then acidified with 2% aqueous hydrogen chloride. The solid is filtered and dissolved in 600 ml. of benzene. This solution is treated with Darco and then extracted with 600 tracts are treated with Darco and Hyflo, filtered and the filtrate is acidified with 2% aqueous hydrogen chloride. The solid is filtered and recrystallized from benzene to yield 15.1 g. of 7-chloro-5,1l-dihydrodibenz[b,e][1,4] thiazepine-S-acetic acid.

To a solution of 9.1 g. of 7-chloro-5,1l-dihydrodibenz- [b,e] [1,4]thiazepine-5-acetic acid in 500 ml. of ethanol, is added 3.0 g. of 31.9% hydrogen peroxide and the solution is heated under reflux for 10 hours. Concentration in vacuo gives 14.2 g. of the semisolid residue which is crystallized from 40 ml. of hot hexane to give 12.4 g. of 7 chloro 5,11 dihydrodibenz[b,e[l,4]- thiazepine-S-acetic acid 10-0xide, M.P. 123-125 This is dissolved in ml. of o-xylene and to this is added 6.4 g. of a-methyl-l-piperazine ethanol in 50 ml. of o-xylene. The reaction mixture is refluxed for 10 hours with azeotropic removal of water. The solvent is removed in vacuo; the residue is triturated with 50 ml. of hexane, the hexane decanted, and the residual liquid is dissolved in 30 ml. of 2-propanol and to this is added a solution of 6.3 g. of maleic acid in 20 ml. of 2-propanol. This on standing gives 12.1 g. of white crystalline solid which is recrystallized from 350 ml. of acetonitrile to give 10.1 g. of the maleate, M.P. about 149-15 1.

EXAMPLES 25 TO 30 Employing the procedure of Example 24, but substituting the acid starting material shown in column 1 of Table IV in forming the oxide which oxide is converted to oxide-acid chloride and then reacting the oxide acid chloride with the starting material shown in column 2, the product shown in column 3 is obtained.

TABLE IV Column 1 Column 2 Column 3 s-om /R| s o-wm EN (3) (Rfln \R (RM (R1)!!! (l; R2 Dnr- H H g HI) n,

EX. N0. R 11 R] m 11: R 'n R] m n: Ba

25 7-Br H 0 1 HN(C;H1)2 As in Column 1 As in Column 2.

26..-.-... 7-01 1 3-01 1 2 02H: As in Column 1 Do.

27...:r.- 7-CF; 1 3-CF: 1 3 Asin Column 1 Do.

HN NCH2CH:OH

28.-..21. 6-CH|O 1 Z-CN 1 4 EN/ As in Column 1 Do.

29-..:..; H 0 3-SOzN-(CH|)2 1 5 E Asin Column 1 Do.

30...- 7 1 3-CH S 1 3 CH: AS111 Column 1 D0;

HN N- EXAMPLE 31 then is concentrated in vacuo. The residue 1s taken up N-[Z-(diethylamino)ethyl]-5,11 dihydro 7 (trifiuoromethyl)dibenz[b,e] [1,4] thiazepine 5 butyramide, 10, lO-dioxide, maleate A suspension of 2.0 g. of sodium cyanide in 10 m1. of dimethyl sulfoxide is heated to 90. To this while stirring, is added within 10 minutes, a solution of 10.3 g. of 5-(3-chloropropyl)-5,1l-dihydro 7-(trifluoromethyl) dibenz[b,e][1,4]thiazepine in ml. of dimethyl sulfoxide. The reaction mixture is heated to 160165 For 45 minutes, allowed to come to and poured into 400 ml. of water. The mixture is saturated with sodium chloride and extracted with 500 ml. of ether. The ether solution is separated and the aqueous layer is again extracted with 2-200 ml. portions of ether. The combined ether extracts are washed, dried, treated with Darco and filtered. The filtrate is concentrated to dryness in vacuo. The semisolid residue is crystallized from 350 ml. of boiling hexane to give about 8.9 g. of white solid, M.P. about 56-64. This is recrystallized from 400 ml. of hexane to give about 7.9 g. of 5,1l-dihydro-11-(trifiuoromethy1)dibenz[b,e][1,4]thiazepine 5 butyronitrile, M.P. about 68-70".

The 5,1 1-dihydro-7-(trifiuoromethyl) dibenz]b,e] [1,4] thiazepine-S-butyronitrile 80.5 g. is dissolved in 1200 m1. of dry dioxane and to this 800 m1. of 30% methanolic hydrogen chloride is added. The solution is stirred for 72 hours, 30 ml. of H 0 is added, the mixture is stirred for 0.5 hour, concentrated in vacuo to 400 ml. filtered,

and the filtrate concentrated to dryness in vacuo. The residue solidifies on keeping, which is then crystallized from hexane to yield 5,11-dihydro-7-(trifluoromethy1)dibenz[b,e][1,4]thiazepine-5-butyric acid, methyl ester, M.P. about 97-98.

The 5,11-dihydro-7-(trifiuoromethyl)dibenz[b,e] [1,4] thiazepine-S-butyric acid, methyl ester, M.P. 97-98. 27.3 g. is dissolved in 2200 ml. of methanol and to this 5.6 g. of potassium hydroxide dissolved in 300 ml. of H 0 is added. The solution is refluxed for 4 hours, and

in 600 ml. of H 0, the solution is cooled, and then acidified with 2% aqueous hydrogen chloride. The solid is filtered and dissolved in 600 ml. of benzene. This solution is treated with Darco and then extracted with 600 ml. of 2% aqueous sodium hydroxide solution. The extracts are treated with Darco and Hyfio, filtered and the filtrate is acidified with 2% aqueous hydrogen chloride. The solid is filtered and recrystallized from benzene to yield 5,11-dihydro-7 (trifluoromethyl)dibenz[b,e] [l,4]thiazepine-5-butyric acid, M.P. about 131-133".

To a solution of 8.1 g. of 5,11-dihydro-7-(trifluoromethyl)dibenz[b.e][1,4]thiazepine-5-butyric acid in 40 'ml. of 98-100% formic acid, is added dropwise, 14

ml. of 30% hydrogen peroxide; this results in an exothermic reaction. The reaction mixture is heated at 70 for 3 hours, and concentrated in vacuo at 45. The residue is dissolved in 300 ml. of ether and the other solution is extracted in 250 ml. of 2% aqueous sodium hydroxide. The alkaline solution is cooled to 5 and made acidic with 10% aqueous hydrochloric acid, the white precipitate filtered and dried. This on crystallization from 350 ml. in hot hexane gives 6.3 g. of 5,11-dihydro-7-(trifluoromethyl)dibenz[b,e][1,4]thiazepine 5-butyric acid, 10,10- dioxide; M.P. 1l5-1l7. This is dissolved in 200 ml. of anhydrous o-xylene and to this 5.0 g. of Z-(diethylamino) ethyl amine is added and refluxed for 10 hours with azeotropic removal of water. Next, the reaction mixture is concentrated to dryness in vacuo at 60 to give 9.2 g. of semisolid residue, which is triturated with 30 ml. of petroleum ether (30-60) when it solidifies to give 8.0 g. of white solid, M.P. about 98-99. This is converted to maleate salt which melts at about 138140.

EXAMPLES 32 TO 37 Employing the procedure of Example 31 but substituting the acid starting material shown in column 1 of Table V in forming the dioxide and then reacting the dioxide with the starting material shown in column 2, the product shown in column 3 is obtained.

TABLE V Column 1 Column 2 Column 3 S-CH: /R2 SOT-CH) HN un, On 011 O R (CHfl -COOH ll/ 1 2)n,CN

R! /R2 Ex. No. R R1 m m R 11 R1 111 m R:

32 7-CF; H 1 (|)CH3 As in Column 1 As in Column 2.

33 6-CF 3-CF 1 2 A l C l 1 z NH C s n o umn Do 34 78-dl-Cl 3-01 1 3 A C l 1 ENE CHN sin oumn D0 35 H 3-CN 1 4 HN( S As in Column 1 DD.

36 8-CN 3SOzN( H:): 1 HN( :)aN( Asln Column 1 Do.

37 7-C2H5S 3-CHaS- 1 6 A C l 1 HNIKCHMN s 1H. 0 umn Do N-CHzCHzOH What is claimed is:

1. A compound of the structure tion salt thereof.

4. The compound having the structure O-CH:

5. The compound having the structure o-crr,

i a H HzCH: NCH2CH2 :Hs):

References Cited UNITED DONALD G. DAUS,

2. A compound in accordance with claim 1 wherein Ais O.

3. A compound in accordance with claim 1 wherein Ais S.

STATES PATENTS Yale et a1 260268 TR Yale et al 260268 TR Yale et al. 260268 TR Yale et a1. 260268 TR Primary Examiner US. Cl. X.R.

260239 BC, 243 B, 247.1, 247.5, 268 TR, 293.57, 293.58, 326.81, 327 B, 999

peca 3:0, 3,766,210 Dated October 16, i 973 In- (s) I -I arrv Louis Yale and Ramesh B. Petigara It is certified that error appears in the above-identifie h d aten' and that said Letters Patent are hereby corrected as she p it wn below:

Column 1, lines 65 to .70,

delete the parenthesis shown in the I formula. I

Column 5, formula number 9, that portion of the formula rea ng:

H II

I H (CH NCH NHCH CH OH should be: \N/

H I (CH2)Z1- EINCHZNHCHZCHZOH Column 6, formula number 17 that portion of the formula reading:

i u \N/ i n \N/ CH CN p I should be: m 2 4 ((IH CN 9 O 2 4" Column 9, line 13 "wherin" should be: wherein Column ll, structure (VX) should be: (XV) Column 13 formula number 17 that portion of the formula reading:

| CH CH should be:

H COOH? CH2C Pacsrz: T20. 3 ,766,2l0 Dated October 16, 1973 Inv-e Harrv Louis Yale and Ramesh B. Petigara rtified that error appears in the above-i dentified ate ers Patent are hereby corrected as s p at hovn below:

Column 13 formula 18 that portion of' the formula reading: '7

II r I should be: f CH CH COOH CH'2CH COOH Column 16, line 2,after "refluxed for" insert the following: 2.5 hours and then concentrated 'in' vacuo. The

residue is l Column 18 Table II, Example l4 Column 2, that portion of the formula reading: a v

" 0CH3 u 7 should be:

Column 20, line-.54 "40 ml." should be: 400 ml Column 20, line 55, "dihydrodibenz[b,e[l,4]-" should be:

- dihydrodibenz [b,e] [l ,4]

. Column 21, line 61 "dibenz]b,e] [1,4] should be:

- diben'z [b, e] [1,4]

Column 22, line 48 "dibenz [b.e] should be: dibenz[b,e] I

Signed and sealed this 21st day of May 1.97M-

(SEAL) I Attest:

EDWARD ILFLETCEER, JR. G. MARSHALL DAih! 0 rl a p D Attesting; Officer pomm1ss1oner' 0.]. Patents 

